Obtained limestone aggregate from a quarry three miles away, at a material and delivery cost of $12
per ton

Obtained spent mushroom compost from an agricultural producer 12 miles away, at a material and
delivery cost of $10 per cubic yard

Completed construction of the treatment system within six weeks, with help from local volunteers,
academic students, and mining companies and coordination by the (non-profit) Slippery Rock
Watershed Coalition

Neutralizes approximately 180 pounds of acid discharge each day

Achieves 100% neutralization of the acid discharge and 99%, 99%, and 70% reductions of iron,
aluminum, and manganese concentrations, respectively , as compared to intake levels

Recovered 30 tons of material (containing approximately 25% manganese oxide) over eight years of
operation

Derives funds for future AMD treatment systems through sale of recovered manganese and iron oxides
to artists or manufacturers specializing in green products

Property End Use: Natural resource conservation area under state programs

Point of Contact:Scott Roberts, PA Department of Environmental Protection